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SPChangeQuery class

Define uma consulta é executada contra o log de alterações na Microsoft SharePoint Foundation.

Inheritance hierarchy

System.Object
  Microsoft.SharePoint.SPChangeQuery

Namespace:  Microsoft.SharePoint
Assembly:  Microsoft.SharePoint (in Microsoft.SharePoint.dll)

Syntax

'Declaração
Public NotInheritable Class SPChangeQuery
'Uso
Dim instance As SPChangeQuery
public sealed class SPChangeQuery

Comentários

Use um objeto SPChangeQuery para definir uma consulta que você pode passar como um argumento para um método GetChanges da classe SPList, SPWeb, SPSiteou SPContentDatabase .

As propriedades da classe SPChangeQuery podem ser usadas para especificar filtros para a consulta. Há dois tipos de propriedades: aqueles que se aplicam ao tipo de objeto que foi alterado e aqueles que se aplicam ao tipo de alteração que ocorreu. Utilize essas propriedades em conjunto com o construtor de SPChangeQuery para definir uma consulta que retornará dados específicos do log de alterações.

Examples

O exemplo a seguir é um aplicativo de console que imprime os nomes de logon de usuários que foram adicionados aos grupos dentro de um conjunto de sites, bem como os grupos aos quais eles foram adicionados e a data da alteração.

using System;
using Microsoft.SharePoint;

namespace Test
{
   class ConsoleApp
   {
      static void Main(string[] args)
      {
         using (SPSite siteCollection = new SPSite("https://localhost"))
         {
            using (SPWeb rootSite = siteCollection.RootWeb)
            {
               // Construct a query.
               SPChangeQuery query = new SPChangeQuery(false, false); 

               // Set a limit on the number of changes returned on a single trip.
               query.FetchLimit = 500;

               // object type 
               query.Group = true;

               // change type
               query.GroupMembershipAdd = true;

               // Get the users and groups for the site collection.
               SPUserCollection users = rootSite.AllUsers;
               SPGroupCollection groups = rootSite.Groups;

               // Convert to local time.
               SPTimeZone timeZone = rootSite.RegionalSettings.TimeZone;

               // total changes
               int total = 0;

               // Loop until we reach the end of the log.
               while (true)
               {
                  SPChangeCollection changes = siteCollection.GetChanges(query);
                  total += changes.Count; // running total

                  foreach (SPChangeGroup change in changes)
                  {
                     // Try to get the group name.
                     string groupName = String.Empty;
                     try
                     {
                        SPGroup group = groups.GetByID(change.Id);
                        groupName = group.Name;
                     }
                     catch (SPException)
                     {
                        groupName = "Unknown";
                     }

                     // Try to get the user name.
                     string loginName = String.Empty;
                     try
                     {
                        SPUser user = users.GetByID(change.UserId);
                        loginName = user.LoginName;
                     }
                     catch (SPException)
                     {
                        loginName = "Unknown";
                     }

                     // Write to the console.
                     Console.WriteLine("\nDate: {0}", 
                          timeZone.UTCToLocalTime(change.Time).ToString());
                     Console.WriteLine("{0} was added to the {1} group.", 
                          loginName, groupName);
                  }

                  // Break out of loop if we have the last batch.
                  if (changes.Count < query.FetchLimit)
                     break;

                  // Otherwise, go get another batch.
                  query.ChangeTokenStart = changes.LastChangeToken;
               }

               Console.WriteLine("\nTotal changes = {0:#,#}", total);
            }
         }
         Console.Write("\nPress ENTER to continue...");
         Console.ReadLine();
      }
   }
}
Imports System
Imports Microsoft.SharePoint

Module ConsoleApp
   Sub Main()
      Using siteCollection As SPSite = New SPSite("https://localhost")
         Using rootSite As SPWeb = siteCollection.RootWeb

            ' Construct a query.
            Dim query As New SPChangeQuery(False, False)

            ' Set a limit on the number of changes returned on a single trip.
            query.FetchLimit = 500

            ' Select the object type. 
            query.Group = True

            ' Select the change type.
            query.GroupMembershipAdd = True

            ' Get the users and groups for the site collection.
            Dim users As SPUserCollection = rootSite.AllUsers
            Dim groups As SPGroupCollection = rootSite.Groups

            ' Convert to local time.
            Dim timeZone As SPTimeZone = rootSite.RegionalSettings.TimeZone

            ' total changes
            Dim total As Integer = 0

            ' Loop until we reach the end of the log.
            While True
               Dim changes As SPChangeCollection = siteCollection.GetChanges(query)
               total += changes.Count ' running total
               For Each change As SPChangeGroup In changes

                  ' Try to get the group name.
                  Dim groupName As String = String.Empty
                  Try
                     Dim group As SPGroup = groups.GetByID(change.Id)
                     groupName = group.Name
                  Catch ex As SPException
                     groupName = "Unknown"
                  End Try

                  ' Try to get the user name.
                  Dim loginName As String = String.Empty
                  Try
                     Dim user As SPUser = users.GetByID(change.UserId)
                     loginName = user.LoginName
                  Catch ex As SPException
                     loginName = "Unknown"
                  End Try

                  ' Write to the console.
                  Console.WriteLine(vbCrLf + "Date: {0}", _
                                    timeZone.UTCToLocalTime(change.Time).ToString())
                  Console.WriteLine("{0} was added to the {1} group.", _
                                    loginName, groupName)

               Next change

               ' Break out of loop if we have the last batch.
               If changes.Count < query.FetchLimit Then
                  Exit While
               End If
               ' Otherwise, go get another batch.
               query.ChangeTokenStart = changes.LastChangeToken
            End While

            Console.WriteLine(vbCrLf + "Total of {0:#,#} changes", total)

         End Using
      End Using

      Console.Write(vbCrLf + "Press ENTER to continue...")
      Console.ReadLine()

   End Sub
End Module

Thread safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Ver também

Referência

SPChangeQuery members

Microsoft.SharePoint namespace